Note 7 - Intangible Assets, Net - Schedule of Finite-lived Intangible Assets (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Dec. 31, 2018
Total intangible assets, Gross Carrying Amount		$ 8,361	$ 8,361
Total intangible assets, Accumulated Amortization		5,950	5,661
Intangible assets, net		$ 2,411	2,700
Customer Relationships [Member]
Total intangible assets, Weighted Average Amortization Period (Year)		4 years 182 days
Total intangible assets, Gross Carrying Amount		$ 272	272
Total intangible assets, Accumulated Amortization		272	272
Intangible assets, net
Customer Backlog [Member]
Total intangible assets, Weighted Average Amortization Period (Year)		1 year 182 days
Total intangible assets, Gross Carrying Amount		$ 93	93
Total intangible assets, Accumulated Amortization		93	93
Intangible assets, net
Core Technologies [Member]
Total intangible assets, Weighted Average Amortization Period (Year)		5 years 36 days
Total intangible assets, Gross Carrying Amount		$ 5,796	5,796
Total intangible assets, Accumulated Amortization		5,165	4,955
Intangible assets, net		$ 631	841
NB-IoT technologies [Member]
Total intangible assets, Weighted Average Amortization Period (Year)	[1]	7 years
Total intangible assets, Gross Carrying Amount	[1]	$ 2,200	2,200
Total intangible assets, Accumulated Amortization	[1]	420	341
Intangible assets, net	[1]	$ 1,780	$ 1,859

[1] During the first quarter of 2018, the Company entered into an agreement to acquire certain NB-IoT technologies in the amount of $2,800, of which $600 has not been received. Of the $2,200, $750 has not resulted in cash outflows as of March 31, 2019. The Company recorded the amortization cost of the NB-IoT technologies in "cost of revenues" on the Company's interim condensed consolidated statements of income.